Fe-Ga合金是人们在新型高性能磁致伸缩材料探索中的一个重要发现,具有高应力灵敏度、良好的热-机械性能和磁致伸缩性能,填补了传统磁致伸缩材料和稀土超磁致伸缩材料之间的空白,在超声领域和微位移器等方面有较大的潜在应用价值,应用前景广阔.本文从Ga含量及相结构、第三组元、制备方法、压力和温度四个部分阐述Fe-Ga磁致伸缩材料的研究进展及研发趋势,总结了Ga含量及相结构、第三组元对Fe-Ga合金的磁致伸缩性能的影响,Fe-Ga合金的磁致伸缩性能与Ga含量密切相关,不同的第三组元对合金磁致伸缩性能的影响也不同;Fe-Ga合金的制备方法主要有定向凝固法、甩带急冷法、轧制法、拉丝法等方法,比较了各种制备方法对材料性能的影响;阐述了应力场和温度对Fe-Ga合金的磁致伸缩性能的影响,其中应力场对Fe-Ga合金的磁致伸缩性能有积极影响,但Fe-Ga合金磁致伸缩的温度依赖性比较复杂,磁致伸缩随温度变化的幅度与趋势都取决于合金结构.
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